In private, Trump vents frustration over lack of progress on North Korea

When he emerged from his summit with Kim Jong Un last month, President Trump tri­umphantly declared that North Korea no longer posed a nuclear threat and that one of the world’s most intractable geopolitical crises had been “largely solved.”

But in the days and weeks since then, U.S. negotiators have faced stiff resistance from a North Korean team practiced in the art of delay and obfuscation.

Diplomats say the North Koreans have canceled follow-up meetings, demanded more money and failed to maintain basic communications, even as the once-isolated regime’s engagements with China and South Korea flourish.

Meanwhile, a missile-engine testing facility that Trump said would be destroyed remains intact, and U.S. intelligence officials say Pyongyang is working to conceal key aspects of its nuclear program.